Plural-part protective casing for solenoid assembly

ABSTRACT

The solenoid assembly of this invention is so designed and arranged that it can be assembled by enclosing an electromagnetic device of the solenoid assembly consisting of coil, core, plunger and the like in a retainer casing made of resilient material, and by accommodating the assembly thus assembled in a cover in its entirety. Thereby, the solenoid assembly is easily assembled and dismantled. Mechanical shocks that may be caused during operation of the electromagnetic device can be absorbed by the resilient material, noises being lessened, and simultaneously the durability of the overall assembly can be remarkably improved.

United States Patent [191 Kanawa PLURAL-PART PROTECTIVE CASING FORSOLENOID ASSEMBLY lnventor:

Haruo Kanawa, Fujisawa, Japan Assignee: Yuken Kogyo Company Ltd.,Fujisawa-shi, Japan Filed: Nov. 18, 1971 Appl. No.: 199,871

[30] Foreign Application Priority Data NOV. 20, 1970 Japan.... 45/101907US. Cl. 335/278, 206/DIG. 33

Field of Search, 335/202, 260, 278; 206/46 FR, 46 H, DIG. 33; 336/90References Cited UNITED STATES- PATENTS 9/1965 Reiner et a1. 335/202 XInt. Cl. I-I0lf 7/00 [451- Nov. 27, 1973 FOREIGN PATENTS OR APPLICATIONS945,183 12/1963 Great Britain 206/46 FR Primary Examiner-George HarrisAtt0mey-Steinberg & Blake [5 7] ABSTRACT The solenoid assembly of thisinvention is so designed and arranged that it can be assembled byenclosing an electromagnetic device of the solenoid assembly consistingof coil, core, plunger and the like in a retainer casing made ofresilient material, and by accommodating the assembly thus assembled ina cover in its entirety. Thereby, the solenoid assembly is easilyassembled and dismantled. Mechanical shocks that may be caused duringoperation of the electromagnetic device can be absorbed by the resilientmaterial, noises being lessened, and simultaneously the durability ofthe overall assembly can be remarkably improved.

7 Claims, 7 Drawing Figures PAIEm nuumma sum 2 0F 5 INVENTOR u, h L

ATTORNEY S Pmmmuovznm 3,775,718

sum u or 5 INVENTOR HARM MM lb A ATTORNEY iin tcved.Moreover, the heat gPLURAL PART, PROTECT]? I u CASING FOR SOLENOID ASSEMBLY This inventionrelates to'a solenoid assembly so'designed and arranged thatit' can beassembledby enclosing an electromagnetic device of thesolenoid assemblyconsisting of coil, core, plunger and the like in a retainer casing madeof resilient material, and byaccommodating the thus resultedfits'sembly' iffa e ovr in' its entirety. 1

The conventional solenoid assembly is "so constituted that anelectromagnetic devic thetecf, consisting of a coil, a core, aplungerand so forth is secured to ametal plate and en closecl in a coverwhich is then'secured to said metalplate, ct that the electromagneticdev ceenclosed within acover is' maihtainedin positionthei'ein underresilient pressure exerted by a spring or other re silient means. Thisconventional solenoid as'seiiibly' had a drawback that the'assernbly anddisni'a i'rigthe'reof are pet'fc'tmshle cnly with considerabletiffictilty.

The present inven ion is aimed attlie eiirninationof these deficienciesinherent in the conventional echstructio'n. According to the present inion, th'e" electromagnetiecomponents such as cc e, coil, plung'er and soforth a 'tet'ained by a retainer element-made from resilient materialand-enclosed'in a cti've' s'c'that the assembly anddismantling'cpetaticns ai p tfdnnable without any difficulty. Accordingto the presen invention, any. mechanical shocks that may hegehetatedduring o eration of the electromagnetic device can be absorbed by thereiliiirriitit'rilghhd the noises can also be lcssened,et 'the"sa'etiihe that the durability of'the'overail assembly e'oiits'tai'iditig'ly rat be dissipated in a satisfactory way hyvirtuedfthethetma]conductivity of the resilient material. a

The t'esentinventidh'will-ncwb explained in'detail byreferring'totheaccompanying drawings. lln the accompanyin d ewingsshcwitlg'cetthinembodi ments of thepre'sentinvehtioh; I

FIG. l is an exploded perspective viewof the first embodiment,

FIG. 2 is an ex lode -pers ective view of the'second embodiment, r V

FIG. 3 is a perspective view'showih'gthe'assei'nbled state ofthe secondembodiment, H

FIG. 4 is'an explddedpet'sptiv Vi'ew'df the third embodiment, t v

FIG. 5 is a plan view ofthe bottom-plate iis'edin the third embodiment,y

FIG. 6 is a longitudinal sectional view of the bottom :hlste of thethird enthcdiiheht, and

, The retaihet a'singcis pte peted rtcm resilient mate- "rial such asttihher andsy'rithetic resin and split lon its center line into theblocks ct egtnents 4, s, defining 'in this way an internal space 9for'hotising said'device B. The oneseg'rn'ent 4 of the retainer casing Cis rcnn ed integrally with a'bottorn'plate 6. It willbe readily realvizedthat the device B can be incorporated into the re- Fla. 7 is anexplanatory'vieiiwinside elevation, showing the state of entigententhetween "the valve and the elc'ctrr'ima'gnetic device.

FIRST EMBODIMENT Referring now to'FlG. l, A'd'enotes'ac'oiier with aninternal space fcr hc'usih an eiec'tt'oihh ghetic'hieatis ct device B ofthe solenoid assem lyan'd a tetaineteasing 'theans C for said deviceniade rtdih resilient materiel.

Said el ctromagnetic deviceB c6 rises a core 1, a coil 2 and a plunger3. The latter istncv d axiallyunde'i the magnetic force generated by theeitetgiz'fiti nof coil 2, thus catlsingthe sbcclmct-sht wmcra valve tohe moved therewith.

tainer casing C byaceomr'nodatin'gthe latter into said segnieht lepfilyi'fig the remaining segment 5 thereto. Then, the assembly thusrepared ishoused in its entirety into the cover-A. The bottom of thecover A is'closed'at thistimehy the bottom plate 6; Thus, the

assembly, and dismantling operation; df he overall assembly areattainable in a hi'g'jhly simplified way.

Numeral 7 deno esancpenin fcr' asssge of a lead wire, and n'urneral 8deno es an c'penin for-passage of a push pin 16 (FIG. 7) abutting at oneend on "the plunger 3 and engaging atthe other with a valve spool,

"not shown.

SECOND'EMBODIMENT The construction ofthe'second embodiment shown inFIGS. 2 and 3'is't'he. same as that of the preceding embodiment,exceptthatthe bottom plate .6 of the retainerc'asing C is. divided alongthe center linedhd formed'iriteg'r'ally with the two portions 4, 5,and'that arecessed'partl l isformed on some portion of thec'asingC forthe mounting of an electrical connector 10 therein, Blin d'holes 12 areformed on two opposing jfa'es ofthe "recessed part '11. The connectorit) is housed withinther'eces's'ed part 11 with its dowel' pi'ns 13snitgl'y rec ived intc s'aidblind hcles l'z, and the en- 'tite-asenthlyincludih the connector 10 thus housed within therec'essed part'isthen accommodated intdthe cover A. The recessed part 11 for housing theelectrical connector can naturall be formed on the retainer easlingCdrthe ptecedingetnhcditnent and the thitd'eih- 'hcdithenttc'be'desctibed hereafter. The connector ct 'pl'lig'loha's prongs 17tobe received in mating recesses of'a pliig. THIRD EMBOD'IMENT' YFIGS.itch illustttttet'hedeta'iled construction of the third embodiment.Inthe present embodiment, thebottemplate 6 is scpaiat d physically fromthe se ments 4,5, thlis'th'e retainer casing C'being comprised of thethree componeiiteleinents, namel the segments 4, 5

and the'bottom plate 6. Other details of construction of the presentembodiments are the same as those of 'the precedin embodiments.

Along the'pe'ripheral art of the lower surface of the bottom-plate6,thereis formeda 'poin'tetl rib 14. When "the'retainer casing .C ishoused within cover A and the clhting c petaticn er the electromagneticdevice can he absorbed b the shtick absdthlng ttcticn 6f esilieiitmaterial,-,and the noise-scan also be lessened, at the same time thatthe durability of the overall assembly can also be improved. Inaddition, since the internal space of the assembly can be lessened andthe heat generated in the coil can be dissipated satisfactorily byvirtue of the thermal conductivity of the resilient material, theoperational efficiency of the solenoid assembly can be enhancedconsiderably.

What we claim is:

1. In a solenoid assembly, electromagnet means having a coil and coreand an armature which is movable with respect to said coil and core,retainer casing means for directly supporting said electromagnet means,said retainer casing means including at least a pair of resilient blocksengaging each other and having a configuration according to which saidblocks define a hollow interior space in which said electromagnet meansis accommodated with said blocks directly engaging and supporting saidelectromagnet means for absorbing shocks and dissipating heat therefrom.

2.- The combination of claim 1 and wherein said retainer casing meanshas an exterior portion formed with a recess, an electrical connectorsituated in said recess and having a conductor connected to said coil ofsaid electromagnet means.

3. The combination of claim 1 and wherein a hollow housing means has aninterior space whose configuration conforms to the exterior of theassembled blocks, said hollow housing means receiving in its interiorsaid blocks of said retainer casing means and said hollow housing meansholding said blocks together so that through said housing means saidblocks of said retainer casing me nsare maintained in -assembledcondition supporting .said electromagnet means for operation, saidhousinglmeans being open at one end, and a closure means closing saidhousing means at said open end thereof.

4. The combination of claim 3and wherein said closure means forms parttof at least one of said blocks.

5. The combinationof claim 3 and wherein said closure means has portionsrespectively forming parts of both of said blocks.

6. The combination of claim 3 and wherein said closure means consists ofa separate closure plate separate from said blocks and closing said openend of said housing means.

7. The combination of claim 6 and wherein a valve means is operativelyconnected with said electromagnet means and is-situated adjacent saidclosure plate, the latter having a peripheral lip directly engaging saidvalve means to form a fluid-tight connection therewith.

1. In a solenoid assembly, electromagnet means having a coil and coreand an armature which is movable with respect to said coil aNd core,retainer casing means for directly supporting said electromagnet means,said retainer casing means including at least a pair of resilient blocksengaging each other and having a configuration according to which saidblocks define a hollow interior space in which said electromagnet meansis accommodated with said blocks directly engaging and supporting saidelectromagnet means for absorbing shocks and dissipating heat therefrom.2. The combination of claim 1 and wherein said retainer casing means hasan exterior portion formed with a recess, an electrical connectorsituated in said recess and having a conductor connected to said coil ofsaid electromagnet means.
 3. The combination of claim 1 and wherein ahollow housing means has an interior space whose configuration conformsto the exterior of the assembled blocks, said hollow housing meansreceiving in its interior said blocks of said retainer casing means andsaid hollow housing means holding said blocks together so that throughsaid housing means said blocks of said retainer casing means aremaintained in assembled condition supporting said electromagnet meansfor operation, said housing means being open at one end, and a closuremeans closing said housing means at said open end thereof.
 4. Thecombination of claim 3 and wherein said closure means forms part of atleast one of said blocks.
 5. The combination of claim 3 and wherein saidclosure means has portions respectively forming parts of both of saidblocks.
 6. The combination of claim 3 and wherein said closure meansconsists of a separate closure plate separate from said blocks andclosing said open end of said housing means.
 7. The combination of claim6 and wherein a valve means is operatively connected with saidelectromagnet means and is situated adjacent said closure plate, thelatter having a peripheral lip directly engaging said valve means toform a fluid-tight connection therewith.